"The most common co-occurring diagnosis for adolescents with substance use disorders is conduct disorder, ADHD, PTSD, and mood disorders (Hulvershorn et al., 2015). An adolescent is still developing in many areas of their lives, especially their brain. Typically by the time an individual reaches adulthood they have reached their maximum potential in terms of growth and development."

How can you tell the difference between an adolescent being moody due to typical teenage angst and someone who is clinically depressed.